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//===-- DarwinLogCollector.h ------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef DarwinLogCollector_h
#define DarwinLogCollector_h
#include <sys/types.h>
#include <memory>
#include <mutex>
#include <unordered_map>
#include "ActivityStore.h"
#include "ActivityStreamSPI.h"
#include "DNBDefs.h"
#include "DarwinLogEvent.h"
#include "DarwinLogInterfaces.h"
#include "JSON.h"
class DarwinLogCollector;
typedef std::shared_ptr<DarwinLogCollector> DarwinLogCollectorSP;
class DarwinLogCollector
: public std::enable_shared_from_this<DarwinLogCollector>,
public ActivityStore {
public:
//------------------------------------------------------------------
/// Return whether the os_log and activity tracing SPI is available.
///
/// @return \b true if the activity stream support is available,
/// \b false otherwise.
//------------------------------------------------------------------
static bool IsSupported();
//------------------------------------------------------------------
/// Return a log function suitable for DNBLog to use as the internal
/// logging function.
///
/// @return a DNBLog-style logging function if IsSupported() returns
/// true; otherwise, returns nullptr.
//------------------------------------------------------------------
static DNBCallbackLog GetLogFunction();
static bool StartCollectingForProcess(nub_process_t pid,
const JSONObject &config);
static bool CancelStreamForProcess(nub_process_t pid);
static DarwinLogEventVector GetEventsForProcess(nub_process_t pid);
~DarwinLogCollector();
pid_t GetProcessID() const { return m_pid; }
//------------------------------------------------------------------
// ActivityStore API
//------------------------------------------------------------------
const char *GetActivityForID(os_activity_id_t activity_id) const override;
std::string
GetActivityChainForID(os_activity_id_t activity_id) const override;
private:
DarwinLogCollector() = delete;
DarwinLogCollector(const DarwinLogCollector &) = delete;
DarwinLogCollector &operator=(const DarwinLogCollector &) = delete;
explicit DarwinLogCollector(nub_process_t pid,
const LogFilterChainSP &filter_chain_sp);
void SignalDataAvailable();
void SetActivityStream(os_activity_stream_t activity_stream);
bool HandleStreamEntry(os_activity_stream_entry_t entry, int error);
DarwinLogEventVector RemoveEvents();
void CancelActivityStream();
void GetActivityChainForID_internal(os_activity_id_t activity_id,
std::string &result, size_t depth) const;
struct ActivityInfo {
ActivityInfo(const char *name, os_activity_id_t activity_id,
os_activity_id_t parent_activity_id)
: m_name(name), m_id(activity_id), m_parent_id(parent_activity_id) {}
const std::string m_name;
const os_activity_id_t m_id;
const os_activity_id_t m_parent_id;
};
using ActivityMap = std::unordered_map<os_activity_id_t, ActivityInfo>;
const nub_process_t m_pid;
os_activity_stream_t m_activity_stream;
DarwinLogEventVector m_events;
std::mutex m_events_mutex;
LogFilterChainSP m_filter_chain_sp;
/// Mutex to protect activity info (activity name and parent structures)
mutable std::mutex m_activity_info_mutex;
/// Map of activity id to ActivityInfo
ActivityMap m_activity_map;
};
#endif /* LogStreamCollector_h */
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